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Finding the Fourth Proportional to 887,702.72, 1,331,359.20 and 256,479.20

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Solution

The fourth proportional to 887,702.72, 1,331,359.20 and 256,479.20 is: 384,662.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    887,702.72 : 1,331,359.20 = 256,479.20 : x
  2. Step 2: Convert to fraction form
    887,702.72/1,331,359.20 = 256,479.20/x
  3. Step 3: Cross multiply
    887,702.72x = 1,331,359.20 × 256,479.20
  4. Step 4: Simplify right side
    887,702.72x = 341,465,942,528.64
  5. Step 5: Solve for x
    x = 341,465,942,528.64/887,702.72
  6. Step 6: Final answer
    x = 384,662.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.